Anatomy of Conjunctiva by Optometry Fans www.optometry.fans https://youtu.be/63Hn9AZZlaA

1. Anatomy of Conjunctiva
Optomety Fans
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2. Anatomy of Conjunctiva
• Conjunctiva is a transparent mucous membrane
which lines the posterior surface of the eyelids
and anterior of the eyeball.
• The name conjunctiva has been given to this
mucous membrane due to the fact that it joins the
eyeball to the lids.
• It stretches from the lid margin to the limbus, and
encloses a complex space called conjunctival sac
which is open in front at the palpebral fissure

4. PARTS OF CONJUNCTIVA
1. Palpebral Conjunctiva
• Marginal Conjunctiva
• Tarsal Conjunctiva
• Orbital Conjunctiva
2. Bulbar Conjunctiva
3. Conjunctival fornix

5. Conjunctiva
Palpebral
Conjunctiva
Marginal
Conjunctiva
Tarsal
Conjunctiva
Orbital
Conjunctiva
Bulbar
Conjunctiva
Limbal
Conjunctiva
Conjunctival
fornix
Superior Fornix
Inferior Fornix
Lateral Fornix
Medial Fornix

6. • 1. Palpebral conjunctiva : It lines
the lids and can be subdivided into
marginal, tarsal and orbital
conjunctiva.

7. Marginal conjunctiva
• It extends from the lid margin to about 2 mm
on the back of lid up to a shallow groove, the
sulcus subtarsalis.
• It is actually a transitional zone between skin
and the conjunctiva proper

8. Tarsal conjunctiva
• Tarsal conjunctiva is thin, transparent and
highly vascular.
• It is firmly adherent to the whole tarsal plate in
the upper lid.
• In the lower lid, it is adherent only to half
width of the tarsus.
• The tarsal glands are seen through it as yellow
streaks

9. Orbital conjunctiva
• Orbital part of palpebral conjunctiva lies loose
between the tarsal plate and fornix.

10. Bulbar Conjunctiva
• It is thin, transparent and lies loose over the underlying
structures and thus can be moved easily.
• It is separated from the anterior sclera by episcleral
tissue and Tenon’s capsule.
• A 3 mm ridge of bulbar conjunctiva around the cornea
is called limbal conjunctiva.
• In the area of limbus, the conjunctiva, Tenon’s capsule
and the episcleral tissue are fused into a dense tissue
which is strongly adherent to the underlying
corneoscleral junction.
• At the limbus, the epithelium of conjunctiva becomes
continuous with that of cornea

11. Conjunctival Fornix
• It is a continuous circular culde-sac which is
broken only on the medial side by caruncle and
the plica semilunaris.
• Conjunctival fornix joins the bulbar
conjunctiva with the palpebral conjunctiva.
• It can be subdivided into superior, inferior,
medial and lateral fornices

12. Structure of conjunctiva
• Histologically the conjunctiva consists of three
layers namely
• Epithelium
• Adenoid layer
• Fibrous layer

13. Glands of conjunctiva
Gland of Conjunctiva
Mucine secretory gland
Goblet cell
Crypts of
henle
Gland of
Manz
Accessory Lacrimal Gland
Gland of Krause
Gland of Wolfrings

14. Mucin secretory glands
Mucin secretory gland include:
• Goblet cells (the unicellular glands located within the
epithelium),
• Crypts of Henle (present in the tarsal conjunctiva), and
• Glands of Manz (found in limbal conjunctiva).
• These glands secrete mucus which is essential for wetting
the cornea and conjunctiva.

15. Accessory lacrimal glands
Accessory lacrimal glands includes..
• Glands of Krause, present in subconjunctival
connective tissue of fornices, about 42 in the
upper fornix and 8 in the lower fornix, and
• Glands of Wolfring, present along the upper
border of superior tarsus and along the lower
border of inferior tarsus.

16. Plica semilunaris
• It is a pinkish crescentric fold of conjunctiva,
present in the medial canthus.
• Its lateral free border is concave.
• It is a vestigeal structure in human beings and
represents the nictitating membrane of lower
animals

18. Caruncle
• The caruncle is a small, ovoid, pinkish mass,
situated in the inner canthus, just medial to the
plica semilunaris.
• In reality, it is a piece of modified skin and so
is covered with stratified squamous epithelium
and contains sweat glands, sebaceous glands
and hair follicles.